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Remove gzip'ed a.out support.

Browse Source 
The current implementation of gzipped a.out support was based
on a very old version of InfoZIP which ships with an ancient
modified version of zlib, and was removed from the GENERIC
kernel in 1999 when we moved to an ELF world.

PR:		205822
Reviewed by:	imp, kib, emaste, Yoshihiro Ota <ota at j.email.ne.jp>
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D21099
This commit is contained in:
delphij 2019-07-30 05:13:16 +00:00
parent 13e88a69dd
commit 87a8992ef2
9 changed files with 0 additions and 2093 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sys/amd64/conf/NOTES
View File

@ -127,7 +127,6 @@ device nvram # Access to rtc cmos via /dev/nvram
device speaker #Play IBM BASIC-style noises out your speaker
hint.speaker.0.at="isa"
hint.speaker.0.port="0x61"
device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
#####################################################################

557
sys/arm/arm/elf_trampoline.c
View File

@ -1,557 +0,0 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2005 Olivier Houchard. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Since we are compiled outside of the normal kernel build process, we
* need to include opt_global.h manually.
*/
#include "opt_global.h"
#include "opt_kernname.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <machine/asm.h>
#include <sys/param.h>
#include <sys/elf32.h>
#include <sys/inflate.h>
#include <machine/elf.h>
#include <machine/pte-v4.h>
#include <machine/cpufunc.h>
#include <machine/armreg.h>
#include <machine/cpu.h>
#include <machine/vmparam.h> /* For KERNVIRTADDR */
#if __ARM_ARCH >= 6
#error "elf_trampline is not supported on ARMv6/v7 platforms"
#endif
extern char kernel_start[];
extern char kernel_end[];
extern void *_end;
void _start(void);
void __start(void);
void __startC(unsigned r0, unsigned r1, unsigned r2, unsigned r3);
extern void do_call(void *, void *, void *, int);
#define GZ_HEAD 0xa
#if defined(CPU_ARM9E)
#define cpu_idcache_wbinv_all armv5_ec_idcache_wbinv_all
extern void armv5_ec_idcache_wbinv_all(void);
#endif
#if defined(SOC_MV_KIRKWOOD) || defined(SOC_MV_DISCOVERY)
#define cpu_l2cache_wbinv_all sheeva_l2cache_wbinv_all
extern void sheeva_l2cache_wbinv_all(void);
#else
#define cpu_l2cache_wbinv_all()
#endif
/*
* Boot parameters
*/
static struct arm_boot_params s_boot_params;
static __inline void *
memcpy(void *dst, const void *src, int len)
{
const char *s = src;
char *d = dst;
while (len) {
if (0 && len >= 4 && !((vm_offset_t)d & 3) &&
!((vm_offset_t)s & 3)) {
*(uint32_t *)d = *(uint32_t *)s;
s += 4;
d += 4;
len -= 4;
} else {
*d++ = *s++;
len--;
}
}
return (dst);
}
static __inline void
bzero(void *addr, int count)
{
char *tmp = (char *)addr;
while (count > 0) {
if (count >= 4 && !((vm_offset_t)tmp & 3)) {
*(uint32_t *)tmp = 0;
tmp += 4;
count -= 4;
} else {
*tmp = 0;
tmp++;
count--;
}
}
}
void
_startC(unsigned r0, unsigned r1, unsigned r2, unsigned r3)
{
int tmp1;
unsigned int sp = ((unsigned int)&_end & ~3) + 4;
unsigned int pc, kernphysaddr;
s_boot_params.abp_r0 = r0;
s_boot_params.abp_r1 = r1;
s_boot_params.abp_r2 = r2;
s_boot_params.abp_r3 = r3;
/*
* Figure out the physical address the kernel was loaded at. This
* assumes the entry point (this code right here) is in the first page,
* which will always be the case for this trampoline code.
*/
__asm __volatile("mov %0, pc\n"
: "=r" (pc));
kernphysaddr = pc & ~PAGE_MASK;
#if defined(FLASHADDR) && defined(PHYSADDR) && defined(LOADERRAMADDR)
if ((FLASHADDR > LOADERRAMADDR && pc >= FLASHADDR) ||
(FLASHADDR < LOADERRAMADDR && pc < LOADERRAMADDR)) {
/*
* We're running from flash, so just copy the whole thing
* from flash to memory.
* This is far from optimal, we could do the relocation or
* the unzipping directly from flash to memory to avoid this
* needless copy, but it would require to know the flash
* physical address.
*/
unsigned int target_addr;
unsigned int tmp_sp;
uint32_t src_addr = (uint32_t)&_start - PHYSADDR + FLASHADDR
+ (pc - FLASHADDR - ((uint32_t)&_startC - PHYSADDR)) & 0xfffff000;
target_addr = (unsigned int)&_start - PHYSADDR + LOADERRAMADDR;
tmp_sp = target_addr + 0x100000 +
(unsigned int)&_end - (unsigned int)&_start;
memcpy((char *)target_addr, (char *)src_addr,
(unsigned int)&_end - (unsigned int)&_start);
/* Temporary set the sp and jump to the new location. */
__asm __volatile(
"mov sp, %1\n"
"mov r0, %2\n"
"mov r1, %3\n"
"mov r2, %4\n"
"mov r3, %5\n"
"mov pc, %0\n"
: : "r" (target_addr), "r" (tmp_sp),
"r" (s_boot_params.abp_r0), "r" (s_boot_params.abp_r1),
"r" (s_boot_params.abp_r2), "r" (s_boot_params.abp_r3)
: "r0", "r1", "r2", "r3");
}
#endif
#ifdef KZIP
sp += KERNSIZE + 0x100;
sp &= ~(L1_TABLE_SIZE - 1);
sp += 2 * L1_TABLE_SIZE;
#endif
sp += 1024 * 1024; /* Should be enough for a stack */
__asm __volatile("adr %0, 2f\n"
"bic %0, %0, #0xff000000\n"
"and %1, %1, #0xff000000\n"
"orr %0, %0, %1\n"
"mrc p15, 0, %1, c1, c0, 0\n" /* CP15_SCTLR(%1)*/
"bic %1, %1, #1\n" /* Disable MMU */
"orr %1, %1, #(4 | 8)\n" /* Add DC enable,
WBUF enable */
"orr %1, %1, #0x1000\n" /* Add IC enable */
"orr %1, %1, #(0x800)\n" /* BPRD enable */
"mcr p15, 0, %1, c1, c0, 0\n" /* CP15_SCTLR(%1)*/
"nop\n"
"nop\n"
"nop\n"
"mov pc, %0\n"
"2: nop\n"
"mov sp, %2\n"
: "=r" (tmp1), "+r" (kernphysaddr), "+r" (sp));
__start();
}
#ifdef KZIP
static unsigned char *orig_input, *i_input, *i_output;
static u_int memcnt; /* Memory allocated: blocks */
static size_t memtot; /* Memory allocated: bytes */
/*
* Library functions required by inflate().
*/
#define MEMSIZ 0x8000
/*
* Allocate memory block.
*/
unsigned char *
kzipmalloc(int size)
{
void *ptr;
static u_char mem[MEMSIZ];
if (memtot + size > MEMSIZ)
return NULL;
ptr = mem + memtot;
memtot += size;
memcnt++;
return ptr;
}
/*
* Free allocated memory block.
*/
void
kzipfree(void *ptr)
{
memcnt--;
if (!memcnt)
memtot = 0;
}
void
putstr(char *dummy)
{
}
static int
input(void *dummy)
{
if ((size_t)(i_input - orig_input) >= KERNCOMPSIZE) {
return (GZ_EOF);
}
return *i_input++;
}
static int
output(void *dummy, unsigned char *ptr, unsigned long len)
{
memcpy(i_output, ptr, len);
i_output += len;
return (0);
}
static void *
inflate_kernel(void *kernel, void *startaddr)
{
struct inflate infl;
unsigned char slide[GZ_WSIZE];
orig_input = kernel;
memcnt = memtot = 0;
i_input = (unsigned char *)kernel + GZ_HEAD;
if (((char *)kernel)[3] & 0x18) {
while (*i_input)
i_input++;
i_input++;
}
i_output = startaddr;
bzero(&infl, sizeof(infl));
infl.gz_input = input;
infl.gz_output = output;
infl.gz_slide = slide;
inflate(&infl);
return ((char *)(((vm_offset_t)i_output & ~3) + 4));
}
#endif
void *
load_kernel(unsigned int kstart, unsigned int curaddr,unsigned int func_end,
int d)
{
Elf32_Ehdr *eh;
Elf32_Phdr phdr[64] /* XXX */, *php;
Elf32_Shdr shdr[64] /* XXX */;
int i,j;
void *entry_point;
int symtabindex = -1;
int symstrindex = -1;
vm_offset_t lastaddr = 0;
Elf_Addr ssym = 0;
Elf_Dyn *dp;
struct arm_boot_params local_boot_params;
eh = (Elf32_Ehdr *)kstart;
ssym = 0;
entry_point = (void*)eh->e_entry;
memcpy(phdr, (void *)(kstart + eh->e_phoff ),
eh->e_phnum * sizeof(phdr[0]));
/* Determine lastaddr. */
for (i = 0; i < eh->e_phnum; i++) {
if (lastaddr < (phdr[i].p_vaddr - KERNVIRTADDR + curaddr
+ phdr[i].p_memsz))
lastaddr = phdr[i].p_vaddr - KERNVIRTADDR +
curaddr + phdr[i].p_memsz;
}
/* Save the symbol tables, as there're about to be scratched. */
memcpy(shdr, (void *)(kstart + eh->e_shoff),
sizeof(*shdr) * eh->e_shnum);
if (eh->e_shnum * eh->e_shentsize != 0 &&
eh->e_shoff != 0) {
for (i = 0; i < eh->e_shnum; i++) {
if (shdr[i].sh_type == SHT_SYMTAB) {
for (j = 0; j < eh->e_phnum; j++) {
if (phdr[j].p_type == PT_LOAD &&
shdr[i].sh_offset >=
phdr[j].p_offset &&
(shdr[i].sh_offset +
shdr[i].sh_size <=
phdr[j].p_offset +
phdr[j].p_filesz)) {
shdr[i].sh_offset = 0;
shdr[i].sh_size = 0;
j = eh->e_phnum;
}
}
if (shdr[i].sh_offset != 0 &&
shdr[i].sh_size != 0) {
symtabindex = i;
symstrindex = shdr[i].sh_link;
}
}
}
func_end = roundup(func_end, sizeof(long));
if (symtabindex >= 0 && symstrindex >= 0) {
ssym = lastaddr;
if (d) {
memcpy((void *)func_end, (void *)(
shdr[symtabindex].sh_offset + kstart),
shdr[symtabindex].sh_size);
memcpy((void *)(func_end +
shdr[symtabindex].sh_size),
(void *)(shdr[symstrindex].sh_offset +
kstart), shdr[symstrindex].sh_size);
} else {
lastaddr += shdr[symtabindex].sh_size;
lastaddr = roundup(lastaddr,
sizeof(shdr[symtabindex].sh_size));
lastaddr += sizeof(shdr[symstrindex].sh_size);
lastaddr += shdr[symstrindex].sh_size;
lastaddr = roundup(lastaddr,
sizeof(shdr[symstrindex].sh_size));
}
}
}
if (!d)
return ((void *)lastaddr);
/*
* Now the stack is fixed, copy boot params
* before it's overrided
*/
memcpy(&local_boot_params, &s_boot_params, sizeof(local_boot_params));
j = eh->e_phnum;
for (i = 0; i < j; i++) {
volatile char c;
if (phdr[i].p_type != PT_LOAD)
continue;
memcpy((void *)(phdr[i].p_vaddr - KERNVIRTADDR + curaddr),
(void*)(kstart + phdr[i].p_offset), phdr[i].p_filesz);
/* Clean space from oversized segments, eg: bss. */
if (phdr[i].p_filesz < phdr[i].p_memsz)
bzero((void *)(phdr[i].p_vaddr - KERNVIRTADDR +
curaddr + phdr[i].p_filesz), phdr[i].p_memsz -
phdr[i].p_filesz);
}
/* Now grab the symbol tables. */
if (symtabindex >= 0 && symstrindex >= 0) {
*(Elf_Size *)lastaddr =
shdr[symtabindex].sh_size;
lastaddr += sizeof(shdr[symtabindex].sh_size);
memcpy((void*)lastaddr,
(void *)func_end,
shdr[symtabindex].sh_size);
lastaddr += shdr[symtabindex].sh_size;
lastaddr = roundup(lastaddr,
sizeof(shdr[symtabindex].sh_size));
*(Elf_Size *)lastaddr =
shdr[symstrindex].sh_size;
lastaddr += sizeof(shdr[symstrindex].sh_size);
memcpy((void*)lastaddr,
(void*)(func_end +
shdr[symtabindex].sh_size),
shdr[symstrindex].sh_size);
lastaddr += shdr[symstrindex].sh_size;
lastaddr = roundup(lastaddr,
sizeof(shdr[symstrindex].sh_size));
*(Elf_Addr *)curaddr = MAGIC_TRAMP_NUMBER;
*((Elf_Addr *)curaddr + 1) = ssym - curaddr + KERNVIRTADDR;
*((Elf_Addr *)curaddr + 2) = lastaddr - curaddr + KERNVIRTADDR;
} else
*(Elf_Addr *)curaddr = 0;
/* Invalidate the instruction cache. */
__asm __volatile("mcr p15, 0, %0, c7, c5, 0\n"
"mcr p15, 0, %0, c7, c10, 4\n"
: : "r" (curaddr));
__asm __volatile("mrc p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
"bic %0, %0, #1\n" /* MMU_ENABLE */
"mcr p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
: "=r" (ssym));
/* Jump to the entry point. */
((void(*)(unsigned, unsigned, unsigned, unsigned))
(entry_point - KERNVIRTADDR + curaddr))
(local_boot_params.abp_r0, local_boot_params.abp_r1,
local_boot_params.abp_r2, local_boot_params.abp_r3);
__asm __volatile(".globl func_end\n"
"func_end:");
/* NOTREACHED */
return NULL;
}
extern char func_end[];
#define PMAP_DOMAIN_KERNEL 0 /*
* Just define it instead of including the
* whole VM headers set.
*/
int __hack;
static __inline void
setup_pagetables(unsigned int pt_addr, vm_paddr_t physstart, vm_paddr_t physend,
int write_back)
{
unsigned int *pd = (unsigned int *)pt_addr;
vm_paddr_t addr;
int domain = (DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT;
int tmp;
bzero(pd, L1_TABLE_SIZE);
for (addr = physstart; addr < physend; addr += L1_S_SIZE) {
pd[addr >> L1_S_SHIFT] = L1_TYPE_S|L1_S_C|L1_S_AP(AP_KRW)|
L1_S_DOM(PMAP_DOMAIN_KERNEL) | addr;
if (write_back && 0)
pd[addr >> L1_S_SHIFT] |= L1_S_B;
}
/* XXX: See below */
if (0xfff00000 < physstart || 0xfff00000 > physend)
pd[0xfff00000 >> L1_S_SHIFT] = L1_TYPE_S|L1_S_AP(AP_KRW)|
L1_S_DOM(PMAP_DOMAIN_KERNEL)|physstart;
__asm __volatile("mcr p15, 0, %1, c2, c0, 0\n" /* set TTB */
"mcr p15, 0, %1, c8, c7, 0\n" /* Flush TTB */
"mcr p15, 0, %2, c3, c0, 0\n" /* Set DAR */
"mrc p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
"orr %0, %0, #1\n" /* MMU_ENABLE */
"mcr p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
"mrc p15, 0, %0, c2, c0, 0\n" /* CPWAIT */
"mov r0, r0\n"
"sub pc, pc, #4\n" :
"=r" (tmp) : "r" (pd), "r" (domain));
/*
* XXX: This is the most stupid workaround I've ever wrote.
* For some reason, the KB9202 won't boot the kernel unless
* we access an address which is not in the
* 0x20000000 - 0x20ffffff range. I hope I'll understand
* what's going on later.
*/
__hack = *(volatile int *)0xfffff21c;
}
void
__start(void)
{
void *curaddr;
void *dst, *altdst;
char *kernel = (char *)&kernel_start;
int sp;
int pt_addr;
__asm __volatile("mov %0, pc" :
"=r" (curaddr));
curaddr = (void*)((unsigned int)curaddr & 0xfff00000);
#ifdef KZIP
if (*kernel == 0x1f && kernel[1] == 0x8b) {
pt_addr = L1_TABLE_SIZE +
rounddown2((int)&_end + KERNSIZE + 0x100, L1_TABLE_SIZE);
setup_pagetables(pt_addr, (vm_paddr_t)curaddr,
(vm_paddr_t)curaddr + 0x10000000, 1);
/* Gzipped kernel */
dst = inflate_kernel(kernel, &_end);
kernel = (char *)&_end;
altdst = 4 + load_kernel((unsigned int)kernel,
(unsigned int)curaddr,
(unsigned int)&func_end + 800 , 0);
if (altdst > dst)
dst = altdst;
/*
* Disable MMU. Otherwise, setup_pagetables call below
* might overwrite the L1 table we are currently using.
*/
cpu_idcache_wbinv_all();
cpu_l2cache_wbinv_all();
__asm __volatile("mrc p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
"bic %0, %0, #1\n" /* MMU_DISABLE */
"mcr p15, 0, %0, c1, c0, 0\n" /* CP15_SCTLR(%0)*/
:"=r" (pt_addr));
} else
#endif
dst = 4 + load_kernel((unsigned int)&kernel_start,
(unsigned int)curaddr,
(unsigned int)&func_end, 0);
dst = (void *)(((vm_offset_t)dst & ~3));
pt_addr = L1_TABLE_SIZE + rounddown2((unsigned int)dst, L1_TABLE_SIZE);
setup_pagetables(pt_addr, (vm_paddr_t)curaddr,
(vm_paddr_t)curaddr + 0x10000000, 0);
sp = pt_addr + L1_TABLE_SIZE + 8192;
sp = sp &~3;
dst = (void *)(sp + 4);
memcpy((void *)dst, (void *)&load_kernel, (unsigned int)&func_end -
(unsigned int)&load_kernel + 800);
do_call(dst, kernel, dst + (unsigned int)(&func_end) -
(unsigned int)(&load_kernel) + 800, sp);
}
/* We need to provide these functions but never call them */
void __aeabi_unwind_cpp_pr0(void);
void __aeabi_unwind_cpp_pr1(void);
void __aeabi_unwind_cpp_pr2(void);
__strong_reference(__aeabi_unwind_cpp_pr0, __aeabi_unwind_cpp_pr1);
__strong_reference(__aeabi_unwind_cpp_pr0, __aeabi_unwind_cpp_pr2);
void
__aeabi_unwind_cpp_pr0(void)
{
}

1
sys/conf/files
View File

@ -3814,7 +3814,6 @@ kern/subr_firmware.c optional firmware
kern/subr_gtaskqueue.c standard
kern/subr_hash.c standard
kern/subr_hints.c standard
kern/subr_inflate.c optional gzip
kern/subr_kdb.c standard
kern/subr_kobj.c standard
kern/subr_lock.c standard

1
sys/conf/files.amd64
View File

@ -633,7 +633,6 @@ isa/syscons_isa.c optional sc
isa/vga_isa.c optional vga
kern/kern_clocksource.c standard
kern/imgact_aout.c optional compat_aout
kern/imgact_gzip.c optional gzip
kern/link_elf_obj.c standard
libkern/x86/crc32_sse42.c standard
#

1
sys/conf/files.i386
View File

@ -529,7 +529,6 @@ isa/syscons_isa.c optional sc
isa/vga_isa.c optional vga
kern/kern_clocksource.c standard
kern/imgact_aout.c optional compat_aout
kern/imgact_gzip.c optional gzip
kern/subr_sfbuf.c standard
libkern/divdi3.c standard
libkern/ffsll.c standard

1
sys/i386/conf/NOTES
View File

@ -275,7 +275,6 @@ device nvram # Access to rtc cmos via /dev/nvram
device speaker #Play IBM BASIC-style noises out your speaker
hint.speaker.0.at="isa"
hint.speaker.0.port="0x61"
device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
device apm_saver # Requires APM

394
sys/kern/imgact_gzip.c
View File

@ -1,394 +0,0 @@
/*-
* SPDX-License-Identifier: Beerware
*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*/
/*
* This module handles execution of a.out files which have been run through
* "gzip". This saves diskspace, but wastes cpu-cycles and VM.
*
* TODO:
* text-segments should be made R/O after being filled
* is the vm-stuff safe ?
* should handle the entire header of gzip'ed stuff.
* inflate isn't quite reentrant yet...
* error-handling is a mess...
* so is the rest...
* tidy up unnecessary includes
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/imgact_aout.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mman.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/racct.h>
#include <sys/resourcevar.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/vnode.h>
#include <sys/inflate.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_extern.h>
struct imgact_gzip {
struct image_params *ip;
struct exec a_out;
int error;
int gotheader;
int where;
u_char *inbuf;
u_long offset;
u_long output;
u_long len;
int idx;
u_long virtual_offset, file_offset, file_end, bss_size;
};
static int exec_gzip_imgact(struct image_params *imgp);
static int NextByte(void *vp);
static int do_aout_hdr(struct imgact_gzip *);
static int Flush(void *vp, u_char *, u_long siz);
static int
exec_gzip_imgact(struct image_params *imgp)
{
int error;
const u_char *p = (const u_char *) imgp->image_header;
struct imgact_gzip igz;
struct inflate infl;
struct vmspace *vmspace;
/* If these four are not OK, it isn't a gzip file */
if (p[0] != 0x1f)
return -1; /* 0 Simply magic */
if (p[1] != 0x8b)
return -1; /* 1 Simply magic */
if (p[2] != 0x08)
return -1; /* 2 Compression method */
if (p[9] != 0x03)
return -1; /* 9 OS compressed on */
/*
* If this one contains anything but a comment or a filename marker,
* we don't want to chew on it
*/
if (p[3] & ~(0x18))
return ENOEXEC; /* 3 Flags */
/* These are of no use to us */
/* 4-7 Timestamp */
/* 8 Extra flags */
bzero(&igz, sizeof igz);
bzero(&infl, sizeof infl);
infl.gz_private = (void *) &igz;
infl.gz_input = NextByte;
infl.gz_output = Flush;
igz.ip = imgp;
igz.idx = 10;
if (p[3] & 0x08) { /* skip a filename */
while (p[igz.idx++])
if (igz.idx >= PAGE_SIZE)
return ENOEXEC;
}
if (p[3] & 0x10) { /* skip a comment */
while (p[igz.idx++])
if (igz.idx >= PAGE_SIZE)
return ENOEXEC;
}
igz.len = imgp->attr->va_size;
error = inflate(&infl);
/*
* The unzipped file may not even have been long enough to contain
* a header giving Flush() a chance to return error. Check for this.
*/
if ( !igz.gotheader )
return ENOEXEC;
if ( !error ) {
vmspace = imgp->proc->p_vmspace;
error = vm_map_protect(&vmspace->vm_map,
(vm_offset_t) vmspace->vm_taddr,
(vm_offset_t) (vmspace->vm_taddr +
(vmspace->vm_tsize << PAGE_SHIFT)) ,
VM_PROT_READ|VM_PROT_EXECUTE,0);
}
if (igz.inbuf)
kmap_free_wakeup(exec_map, (vm_offset_t)igz.inbuf, PAGE_SIZE);
if (igz.error || error) {
printf("Output=%lu ", igz.output);
printf("Inflate_error=%d igz.error=%d where=%d\n",
error, igz.error, igz.where);
}
if (igz.error)
return igz.error;
if (error)
return ENOEXEC;
return 0;
}
static int
do_aout_hdr(struct imgact_gzip * gz)
{
int error;
struct vmspace *vmspace;
vm_offset_t vmaddr;
/*
* Set file/virtual offset based on a.out variant. We do two cases:
* host byte order and network byte order (for NetBSD compatibility)
*/
switch ((int) (gz->a_out.a_midmag & 0xffff)) {
case ZMAGIC:
gz->virtual_offset = 0;
if (gz->a_out.a_text) {
gz->file_offset = PAGE_SIZE;
} else {
/* Bill's "screwball mode" */
gz->file_offset = 0;
}
break;
case QMAGIC:
gz->virtual_offset = PAGE_SIZE;
gz->file_offset = 0;
break;
default:
/* NetBSD compatibility */
switch ((int) (ntohl(gz->a_out.a_midmag) & 0xffff)) {
case ZMAGIC:
case QMAGIC:
gz->virtual_offset = PAGE_SIZE;
gz->file_offset = 0;
break;
default:
gz->where = __LINE__;
return (-1);
}
}
gz->bss_size = roundup(gz->a_out.a_bss, PAGE_SIZE);
/*
* Check various fields in header for validity/bounds.
*/
if ( /* entry point must lay with text region */
gz->a_out.a_entry < gz->virtual_offset ||
gz->a_out.a_entry >= gz->virtual_offset + gz->a_out.a_text ||
/* text and data size must each be page rounded */
gz->a_out.a_text & PAGE_MASK || gz->a_out.a_data & PAGE_MASK) {
gz->where = __LINE__;
return (-1);
}
/*
* text/data/bss must not exceed limits
*/
PROC_LOCK(gz->ip->proc);
if ( /* text can't exceed maximum text size */
gz->a_out.a_text > maxtsiz ||
/* data + bss can't exceed rlimit */
gz->a_out.a_data + gz->bss_size >
lim_cur_proc(gz->ip->proc, RLIMIT_DATA) ||
racct_set(gz->ip->proc, RACCT_DATA,
gz->a_out.a_data + gz->bss_size) != 0) {
PROC_UNLOCK(gz->ip->proc);
gz->where = __LINE__;
return (ENOMEM);
}
PROC_UNLOCK(gz->ip->proc);
/* Find out how far we should go */
gz->file_end = gz->file_offset + gz->a_out.a_text + gz->a_out.a_data;
/*
* Avoid a possible deadlock if the current address space is destroyed
* and that address space maps the locked vnode. In the common case,
* the locked vnode's v_usecount is decremented but remains greater
* than zero. Consequently, the vnode lock is not needed by vrele().
* However, in cases where the vnode lock is external, such as nullfs,
* v_usecount may become zero.
*/
VOP_UNLOCK(gz->ip->vp, 0);
/*
* Destroy old process VM and create a new one (with a new stack)
*/
error = exec_new_vmspace(gz->ip, &aout_sysvec);
vn_lock(gz->ip->vp, LK_EXCLUSIVE | LK_RETRY);
if (error) {
gz->where = __LINE__;
return (error);
}
vmspace = gz->ip->proc->p_vmspace;
vmaddr = gz->virtual_offset;
error = vm_mmap(&vmspace->vm_map,
&vmaddr,
gz->a_out.a_text + gz->a_out.a_data,
VM_PROT_ALL, VM_PROT_ALL, MAP_ANON | MAP_FIXED,
OBJT_DEFAULT,
NULL,
0);
if (error) {
gz->where = __LINE__;
return (error);
}
if (gz->bss_size != 0) {
/*
* Allocate demand-zeroed area for uninitialized data.
* "bss" = 'block started by symbol' - named after the
* IBM 7090 instruction of the same name.
*/
vmaddr = gz->virtual_offset + gz->a_out.a_text +
gz->a_out.a_data;
error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr,
gz->bss_size, 0, VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL,
0);
if (error) {
gz->where = __LINE__;
return (error);
}
}
/* Fill in process VM information */
vmspace->vm_tsize = gz->a_out.a_text >> PAGE_SHIFT;
vmspace->vm_dsize = (gz->a_out.a_data + gz->bss_size) >> PAGE_SHIFT;
vmspace->vm_taddr = (caddr_t) (uintptr_t) gz->virtual_offset;
vmspace->vm_daddr = (caddr_t) (uintptr_t)
(gz->virtual_offset + gz->a_out.a_text);
/* Fill in image_params */
gz->ip->interpreted = 0;
gz->ip->entry_addr = gz->a_out.a_entry;
gz->ip->proc->p_sysent = &aout_sysvec;
return 0;
}
static int
NextByte(void *vp)
{
int error;
struct imgact_gzip *igz = (struct imgact_gzip *) vp;
if (igz->idx >= igz->len) {
igz->where = __LINE__;
return GZ_EOF;
}
if (igz->inbuf && igz->idx < (igz->offset + PAGE_SIZE)) {
return igz->inbuf[(igz->idx++) - igz->offset];
}
if (igz->inbuf)
kmap_free_wakeup(exec_map, (vm_offset_t)igz->inbuf, PAGE_SIZE);
igz->offset = igz->idx & ~PAGE_MASK;
error = vm_mmap(exec_map, /* map */
(vm_offset_t *) & igz->inbuf, /* address */
PAGE_SIZE, /* size */
VM_PROT_READ, /* protection */
VM_PROT_READ, /* max protection */
0, /* flags */
OBJT_VNODE, /* handle type */
igz->ip->vp, /* vnode */
igz->offset); /* offset */
if (error) {
igz->where = __LINE__;
igz->error = error;
return GZ_EOF;
}
return igz->inbuf[(igz->idx++) - igz->offset];
}
static int
Flush(void *vp, u_char * ptr, u_long siz)
{
struct imgact_gzip *gz = (struct imgact_gzip *) vp;
u_char *p = ptr, *q;
int i;
/* First, find an a.out-header. */
if (gz->output < sizeof gz->a_out) {
q = (u_char *) & gz->a_out;
i = min(siz, sizeof gz->a_out - gz->output);
bcopy(p, q + gz->output, i);
gz->output += i;
p += i;
siz -= i;
if (gz->output == sizeof gz->a_out) {
gz->gotheader = 1;
i = do_aout_hdr(gz);
if (i == -1) {
if (!gz->where)
gz->where = __LINE__;
gz->error = ENOEXEC;
return ENOEXEC;
} else if (i) {
gz->where = __LINE__;
gz->error = i;
return ENOEXEC;
}
if (gz->file_offset == 0) {
q = (u_char *) (uintptr_t) gz->virtual_offset;
copyout(&gz->a_out, q, sizeof gz->a_out);
}
}
}
/* Skip over zero-padded first PAGE if needed */
if (gz->output < gz->file_offset &&
gz->output + siz > gz->file_offset) {
i = min(siz, gz->file_offset - gz->output);
gz->output += i;
p += i;
siz -= i;
}
if (gz->output >= gz->file_offset && gz->output < gz->file_end) {
i = min(siz, gz->file_end - gz->output);
q = (u_char *) (uintptr_t)
(gz->virtual_offset + gz->output - gz->file_offset);
copyout(p, q, i);
gz->output += i;
p += i;
siz -= i;
}
gz->output += siz;
return 0;
}
/*
* Tell kern_execve.c about it, with a little help from the linker.
*/
static struct execsw gzip_execsw = {
.ex_imgact = exec_gzip_imgact,
.ex_name = "gzip"
};
EXEC_SET(execgzip, gzip_execsw);

1084
sys/kern/subr_inflate.c
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53
sys/sys/inflate.h
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@ -1,53 +0,0 @@
/*-
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* $FreeBSD$
*
*/
#ifndef _SYS_INFLATE_H_
#define _SYS_INFLATE_H_
#if defined(_KERNEL) || defined(KZIP)
#define GZ_EOF -1
#define GZ_WSIZE 0x8000
/*
* Global variables used by inflate and friends.
* This structure is used in order to make inflate() reentrant.
*/
struct inflate {
/* Public part */
/* This pointer is passed along to the two functions below */
void *gz_private;
/* Fetch next character to be uncompressed */
int (*gz_input)(void *);
/* Dispose of uncompressed characters */
int (*gz_output)(void *, u_char *, u_long);
/* Private part */
u_long gz_bb; /* bit buffer */
unsigned gz_bk; /* bits in bit buffer */
unsigned gz_hufts; /* track memory usage */
struct huft *gz_fixed_tl; /* must init to NULL !! */
struct huft *gz_fixed_td;
int gz_fixed_bl;
int gz_fixed_bd;
u_char *gz_slide;
unsigned gz_wp;
};
int inflate(struct inflate *);
#endif /* _KERNEL || KZIP */
#endif /* ! _SYS_INFLATE_H_ */